fix: multisig config on Docker

[luislhl]

Acceptance Criteria

This PR extracts a fix from #450, so I just copied the description from there, which was good enough:

• Fixing multisig param types: when deploying on some cloud environments (such as GCP Cloud Run), the multisig_seed${x}max_signatures and multisig_seed${x}num_signatures are threated as strings, not integers. When starting the multisig, the comparison made with this params is a exact on ( "===") so it fails. By parsing the params before we can avoid that.

src/controllers/index.controller.js Ln 100-101:

  const mconfig = config.multisig[multisigKey];
    console.log('mconfig', mconfig);
    if (!(mconfig
           && (mconfig.total && mconfig.numSignatures && mconfig.pubkeys)
           && (mconfig.pubkeys.length === mconfig.total)
           && (mconfig.numSignatures <= mconfig.total))) {
      // Missing multisig items
      console.error(`Improperly configured multisig for seed ${multisigKey}.`);
      res.send({
        success: false,
        message: `Improperly configured multisig for seed ${multisigKey}.`
      });
      return;

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.59%. Comparing base (bca21f6) to head (177d555).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #472   +/-   ##
=======================================
  Coverage   89.59%   89.59%           
=======================================
  Files          51       51           
  Lines        2173     2173           
  Branches      413      413           
=======================================
  Hits         1947     1947           
  Misses        209      209           
  Partials       17       17           

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